Correct me if I am wrong, but Jay, the guy in the video, seems to have invented something akin to a specialized transistor -- although half of it is mechanical

Correct me if I am wrong, but Jay, the guy in the video, seems to have invented something akin to a specialized transistor -- although half of it is mechanical (the valve) and half of it is RF/electrical in nature, and it's water-based... but it would seem to emulate the switching function of a transistor... Again, correct me if I am wrong (also, I am currently unsure of this device's ability as an amplifier... but that's because electricity is not used for the valve... but considering a transistor as a pure on/off switch for electricity (the other role/functionality of a transistor), it would seem to work as one... What I think would be interesting to try -- would be to use another source of electricity in lieu of the mechanical valve -- to attempt to stop and start the main flow of electricity... I think some interesting stuff could be learned from experiments in that direction...